These results indicate that examining a greater number of lymph nodes in patients with stage I NSCLC treated with resection increases the likelihood of proper staging and affects patient outcome. Such information is important not only for therapy and prognosis of individuals but also for identifying those who may benefit from adjuvant therapy.
Codon 12 K-ras mutations were more common in adenocarcinomas than in squamous cell carcinomas. For the subgroup with stage II NSCLC, there was a statistically significant adverse effect on survival for the presence of K-ras mutations. However, when the entire group was considered, the presence of K-ras mutations was not of prognostic significance in this cohort of patients with resected early-stage NSCLC.
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